Well i had this same code. I got it after installing the Needswings Catch Can. Long story short, I had a leak at the upper intake manifold. Seems the screws have some type of locktite from the factory and I removed the manifolds for the instal and didn't use any type of locktite on the re instal so the screws backed out causing an intake manifold leak. Check the torque on the screws. If they are loose get new gaskets and use locktite ..... can't remember which one. I think it's the blue. Use the not so permanent color.

Les